phase 2 early atmosphere

Cards (8)

As the earth cooled what happened to the water vapour?
It condensed to form oceans
What gas dissolved into the oceans?
Carbon dioxide
What happened to the carbon dioxide once it dissolved into the oceans?
It reacted forming carbonate precipitates which then formed sediments
What did marine life's shells and skeletons develop from?
carbonates
What do the marine life's shells and skeletons form when they die?
fossil fuels
green plants and algae evolved to perform what process?
photosynthesis
What did photosynthesis reduce in the early atmosphere?
carbon dioxide levels
Give the products of photosynthesis
oxygen and glucose